I don't get a proper flow.my last periods date was may 12th and I had for 4 to 5 days,it was normal before.But even before I will have flow even for 2 days or even 1 day.even I had a flow for 16 days but it was not too heavy. Just a few drops per day.this June12th I had only 1 day.in june29 I had a flow but it will be only one drop.same the next day.i found  the flow only after I pee. I get lite shade of black discharge instead of white discharge.when I found it will be for heat and after taking cool food items it is becoming normal. I need to know whether it is normal or any issues.